I was saying the same thing, not taking extend is short sighted, it is a team player feat not a greedy feat.
There are plenty of times, in raids where the caster is handing out some of the buffs, if they aren't extended they won't last the encounter, same in epics, which makes them to me I don't want in my raids because there has to be a safety margin.
I got 6 neg reps for saying this last time, those 6 people just don't understand that there are 12 people in a raid not just 1. There are 6 people in a party not just 1.
Imagine an elite ToD or VoD last fight can last around 20 minutes, get towards the end of that peoples buffs go especially the tanks, it could of just gone south. I am a raid leader for my guild more often than not and safety margins are built into the strategy this includes extended buffs.
Even IF you know you usually do it in 10 minutes, you never know when someone will DC or the tank will go south, or someone just gets unlucky, extend is a safety margin that is key at endgame.